Create your own at Storyboard ThatRobert Hooke, Antonie van Leeuwenhoek, Matthias Schleiden, Theodor Schwann, and Rudolph Virchow all contributed to cell theory. Robert Hooke was the first person to see cells through a light microscope. Antonie van Leeuwenhoek was the first to observe living cells. Matthias Schleiden observed plant cells. Theodor Schwann observed animal tissue. Rudolph Virchow found that only cells come from other cells. We developed Cell Theory! CELL THEORY •Cells only come from other cells I viewed the cells of a cork through a light microscope. I discovered animalcules! All plants are aggregates of seperate cells. All animals are composed of individual cells! Cells only can be formed from other cells!